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or is the 243 shoulder too wide?
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You are correct in noting that the shoulder is too wide. The .257 is longer, but it has more taper.
I have always been told by gunsmiths who bore and rerifle that the general rule of thumb is to go up two calibers from the host caliber to the target caliber. IWO, you would need to go to 6.5 cal.
A .22/.250 barrel will easily go to .25 cal. Either .250 Sav. or .257 Robts. Hope this helps...
GH
"As you walk thru life, don't be surprised that there are fewer people that you encounter seeking truth than those seeking confirmation of what they already believe!"
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Thanks, That's what I had thought. I'd rather have the .250 Savage so a rebarrel might be on the agenda.
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Mike,
A few years ago I had various rifles rebored. At that time, cost was only about $90. The price has steadily gone up to the point that it's not all that economical any more. It's up to around $250 or so now. You can about buy a new contoured barrel blank for that.
About the only reason to have one bored is if it's a vintage rifle with special markings and one wishes to retain the original barrel or if the rifle in question is an octagon or half-octagon barrel.
GH
"As you walk thru life, don't be surprised that there are fewer people that you encounter seeking truth than those seeking confirmation of what they already believe!"
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I have always been told by gunsmiths who bore and rerifle that the general rule of thumb is to go up two calibers from the host caliber to the target caliber. IWO, you would need to go to 6.5 cal. Hope this helps...
GH Oregunsmithing will bore a 243 Win to 257 Roberts. Possibly he sets the shoulder back?
Last edited by like2shoot; 02/15/12.
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Campfire 'Bwana
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The barrel would have to be set back roughly 0.5" to insure that there would be enough steel to cut a clean chamber. The 243 case has less taper from the base to the bottom of the shoulder than does the 257 Roberts. The 257 Roberts case is longer from the base to the bottom of the shoulder, 1.728", than the 243, 1.560", but the diameter at the bottom of the shoulder is 0.430" for the 257 Roberts and 0.454" for the 243.
The degree of difficulty/viability of this job depends significantly on the contour of the barrel and the action that it has been made for. A barrel with a flat face, Marlin/Savage will be easier than a barrel with a recessed face, like a Remington 700.
Jeff
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